Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements
This study reviews an alternative of reinforced concrete finite element model as a system, where physical conditions for system components are recorded independently and, in addition, conditions for interaction of system components on their contact are also introduced. In this case, we are able to t...
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| Format: | Article |
| Language: | English |
| Published: |
Vilnius Gediminas Technical University
2005-09-01
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| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | http://localhost/journals.vgtu.lt/index.php/JCEM/article/view/8906 |
| _version_ | 1818893489821188096 |
|---|---|
| author | Andrey V. Benin |
| author_facet | Andrey V. Benin |
| author_sort | Andrey V. Benin |
| collection | DOAJ |
| description | This study reviews an alternative of reinforced concrete finite element model as a system, where physical conditions for system components are recorded independently and, in addition, conditions for interaction of system components on their contact are also introduced. In this case, we are able to take into account all specific features of reinforcement, to trace the history of loading and destruction for each rebar. Basic specific feature of reviewed problem ascertains the necessity to use nonâ€linear stressâ€strain ratio in reinforced concrete with consideration of specific features of reinforced concrete activity after cracking. Naturally, functional dependence describing this ratio varies along with the progress of rebars corrosion. Exactly, corrosion of rebars is the key reason for timeâ€dependent quality degrading of reinforced concrete structures. This problem stands for more urgency with respect to structures in seismic sensitive zones since such corrosion of rebars leads to deviations of the structure rigidity characteristics and, in turn, it may lead to an reduction of bearing capability in certain elements or to an increase of displacements to intolerable high values. This study proposes a clarified procedure to solve planeâ€stressed problem for reinforced concrete. The specific feature of this procedure assumes an application of new approximation for nonâ€linear concrete strain diagram, development of a detailed finite element model for reproduction of effect generated under concrete/rebar bond forces, as well as such considerable timeâ€dependent factors as concrete creep and rebar corrosion.
Betono ir armatÅ«ros sukibimo įvertinimas skaiÄiuojant gelžbetoninių elementų atsparumÄ… seisminÄ—ms apkrovoms
Santrauka
Apžvelgtas alternatyvus gelžbetoninių baigtinių elementų modelis, kuriame atskirai įvertintos kiekvieno sistemos elemento fizikinÄ—s sÄ…lygos ir papildomai atsižvelgta į sistemos elementų tarpusavio sÄ…veikÄ…. Tokiu atveju atsiranda galimybÄ— įvertinti specifines armatÅ«ros savybes, stebÄ—ti apkrovimo istorijÄ… ir kiekvieno strypo irimÄ…. Sprendžiant apraÅ¡ytÄ… problemÄ… reikia įvertinti netiesinį gelžbetonio įtempiųâ€deformacijų bÅ«vį, atsiradus plyÅ¡iams elemente. Be abejo, Å¡iam bÅ«viui apraÅ¡yti taikoma funkcija priklauso nuo strypų korozijos lygio. BÅ«tent strypų korozija yra pagrindinis veiksnys, lemiantis gelžbetoninių elementų degradacijÄ… laikui bÄ—gant. Å i problema ypaÄ aktuali konstrukcijas eksploatuojant seisminÄ—se zonose, kadangi strypų korozija mažina elemento standumÄ…, o tai savo ruožtu sukelia jo laikomosios galios sumažėjimÄ… arba įlinkių didÄ—jimÄ… iki neleistinų reikÅ¡mių. Pateikta apraÅ¡ytos problemos sprendimo metodika, kuri taikoma gelžbetoninių elementų plokÅ¡Äiojo įtempių bÅ«vio atveju. Pagal Å¡iÄ… metodikÄ… taikoma nauja netiesinÄ—s betono įtempiųâ€deformacijų diagramos aproksimacija, sukurtas detalus baigtinių elementų modelis betono ir armatÅ«ros sukibimui įvertinti, atsižvelgta į laikui bÄ—gant atsirandanÄius efektus, tokius kaip betono valkÅ¡numas ir armatÅ«ros korozija.
Raktiniai žodžiai: gelžbetonis, baigtiniu elementu modelis, netiesinės deformacijos, strypų korozija, seisminis smūgis.
First Published Online: 14 Oct 2010 |
| first_indexed | 2024-12-19T18:13:25Z |
| format | Article |
| id | doaj.art-8412a2efaddc4900934c609f03dad6c7 |
| institution | Directory Open Access Journal |
| issn | 1392-3730 1822-3605 |
| language | English |
| last_indexed | 2024-12-19T18:13:25Z |
| publishDate | 2005-09-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj.art-8412a2efaddc4900934c609f03dad6c72022-12-21T20:11:15ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052005-09-0111310.3846/13923730.2005.9636346Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elementsAndrey V. Benin0Petersburg State Transport University , Moskovskiy pr. 9, St. Petersburg, 190031, RussiaThis study reviews an alternative of reinforced concrete finite element model as a system, where physical conditions for system components are recorded independently and, in addition, conditions for interaction of system components on their contact are also introduced. In this case, we are able to take into account all specific features of reinforcement, to trace the history of loading and destruction for each rebar. Basic specific feature of reviewed problem ascertains the necessity to use nonâ€linear stressâ€strain ratio in reinforced concrete with consideration of specific features of reinforced concrete activity after cracking. Naturally, functional dependence describing this ratio varies along with the progress of rebars corrosion. Exactly, corrosion of rebars is the key reason for timeâ€dependent quality degrading of reinforced concrete structures. This problem stands for more urgency with respect to structures in seismic sensitive zones since such corrosion of rebars leads to deviations of the structure rigidity characteristics and, in turn, it may lead to an reduction of bearing capability in certain elements or to an increase of displacements to intolerable high values. This study proposes a clarified procedure to solve planeâ€stressed problem for reinforced concrete. The specific feature of this procedure assumes an application of new approximation for nonâ€linear concrete strain diagram, development of a detailed finite element model for reproduction of effect generated under concrete/rebar bond forces, as well as such considerable timeâ€dependent factors as concrete creep and rebar corrosion. Betono ir armatÅ«ros sukibimo įvertinimas skaiÄiuojant gelžbetoninių elementų atsparumÄ… seisminÄ—ms apkrovoms Santrauka Apžvelgtas alternatyvus gelžbetoninių baigtinių elementų modelis, kuriame atskirai įvertintos kiekvieno sistemos elemento fizikinÄ—s sÄ…lygos ir papildomai atsižvelgta į sistemos elementų tarpusavio sÄ…veikÄ…. Tokiu atveju atsiranda galimybÄ— įvertinti specifines armatÅ«ros savybes, stebÄ—ti apkrovimo istorijÄ… ir kiekvieno strypo irimÄ…. Sprendžiant apraÅ¡ytÄ… problemÄ… reikia įvertinti netiesinį gelžbetonio įtempiųâ€deformacijų bÅ«vį, atsiradus plyÅ¡iams elemente. Be abejo, Å¡iam bÅ«viui apraÅ¡yti taikoma funkcija priklauso nuo strypų korozijos lygio. BÅ«tent strypų korozija yra pagrindinis veiksnys, lemiantis gelžbetoninių elementų degradacijÄ… laikui bÄ—gant. Å i problema ypaÄ aktuali konstrukcijas eksploatuojant seisminÄ—se zonose, kadangi strypų korozija mažina elemento standumÄ…, o tai savo ruožtu sukelia jo laikomosios galios sumažėjimÄ… arba įlinkių didÄ—jimÄ… iki neleistinų reikÅ¡mių. Pateikta apraÅ¡ytos problemos sprendimo metodika, kuri taikoma gelžbetoninių elementų plokÅ¡Äiojo įtempių bÅ«vio atveju. Pagal Å¡iÄ… metodikÄ… taikoma nauja netiesinÄ—s betono įtempiųâ€deformacijų diagramos aproksimacija, sukurtas detalus baigtinių elementų modelis betono ir armatÅ«ros sukibimui įvertinti, atsižvelgta į laikui bÄ—gant atsirandanÄius efektus, tokius kaip betono valkÅ¡numas ir armatÅ«ros korozija. Raktiniai žodžiai: gelžbetonis, baigtiniu elementu modelis, netiesinÄ—s deformacijos, strypų korozija, seisminis smÅ«gis. First Published Online: 14 Oct 2010http://localhost/journals.vgtu.lt/index.php/JCEM/article/view/8906reinforced concretefinite element modelnonâ€linear deformationcorrosion of rebarsseismic impact |
| spellingShingle | Andrey V. Benin Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements Journal of Civil Engineering and Management reinforced concrete finite element model nonâ€linear deformation corrosion of rebars seismic impact |
| title | Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| title_full | Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| title_fullStr | Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| title_full_unstemmed | Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| title_short | Accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| title_sort | accounting for effects of decreasing bond between concrete and rebars on seismic resistance of reinforced concrete structural elements |
| topic | reinforced concrete finite element model nonâ€linear deformation corrosion of rebars seismic impact |
| url | http://localhost/journals.vgtu.lt/index.php/JCEM/article/view/8906 |
| work_keys_str_mv | AT andreyvbenin accountingforeffectsofdecreasingbondbetweenconcreteandrebarsonseismicresistanceofreinforcedconcretestructuralelements |